Knowledge Check_Numbers
Knowledge Check
Q1: In the Indian system, the place value of 7 in 7,25,000 is
A) 7,000
B) 70,000
C) 7,00,000
D) 7,25,000
Q2: 6,500,000 in the international system is read as
A) Six lakh fifty thousand
B) Sixty-five lakh
C) Six million five hundred thousand
D) Sixty-five million
Q3: The face value of digit 9 in 49,362 is
A) 9
B) 90
C) 900
D) 9000
Q4: Which of the following is a whole number?
A) −5
B) 0
C) 3/7
D) 1.5
Q5: Which of the following lies between -3 and -1 on number line?
A) -4
B) 0
C) -2
D) 1
Q6: Which of the following is a rational number?
A) √2
B) 3/4
C) π
D) √5
Q7: The reciprocal of 8/5 is
A) 5/8
B) 8/5
C) -5/8
D) -8/5
Q8: Between two rational numbers, the number of rational numbers is
A) Zero
B) One
C) Finite
D) Infinite
Q9: Which of these is not an integer?
A) -7
B) 0
C) 4
D) 2/3
Q10: Which is the smallest among the given?
A) -3
B) -5
C) -1
D) 0
Q11: The additive identity for rational numbers is
A) 1
B) -1
C) 0
D) ∞
Q12: The multiplicative identity of integers is
A) 0
B) 1
C) -1
D) 10
Q13: Which number has all properties of closure, associative and commutative under addition?
A) Natural numbers
B) Whole numbers
C) Integers
D) Rational numbers
Q14: If the product of a number and its reciprocal is
A) 0
B) Same number
C) 1
D) -1
Q15: Which of the following decimals is rational?
A) 0.123456…
B) 0.1010010001…
C) 0.75
D) √3
FOUR FUNDAMENTAL OPERATIONS
Q16: A farmer harvested 358 bags of rice in the morning and 642 in the evening. Total bags harvested are
A) 900
B) 920
C) 1000
D) 1100
Q17: A shopkeeper had ₹1,000. After spending ₹375, how much money remains?
A) ₹625
B) ₹635
C) ₹725
D) ₹525
Q18: A classroom has 36 students and 8 equal rows. How many students are in each row?
A) 4
B) 5
C) 6
D) 8
Q19: If 45 × 12 = ?
A) 480
B) 520
C) 540
D) 560
Q20: Which operation should be done first in the expression: 20 + 6 × 5?
A) Addition
B) Multiplication
C) Subtraction
D) Division
Q21: The difference between 784 and 539 is
A) 245
B) 235
C) 255
D) 225
Q22: A school bought 24 boxes of chalks, each containing 50 sticks. Total chalk sticks are
A) 1200
B) 900
C) 1400
D) 1500
Q23: Which of these gives correct result: 144 ÷ 12?
A) 10
B) 11
C) 12
D) 14
Q24: The sum of smallest two digit number and largest one digit number is
A) 19
B) 20
C) 21
D) 18
Q25: Which of the following is a correct division statement?
A) 36 ÷ 6 = 5
B) 36 ÷ 6 = 6
C) 36 ÷ 6 = 7
D) 36 ÷ 6 = 8
Q26: 2.5 + 1.75 =
A) 4.25
B) 4.0
C) 3.25
D) 3.5
Q27: Which of the following fractions equals 3/4?
A) 6/10
B) 9/12
C) 8/14
D) 10/16
Q28: Which operation is used to find the total of equal groups?
A) Division
B) Subtraction
C) Multiplication
D) Addition
Q29: The quotient when 405 is divided by 5 is
A) 81
B) 75
C) 85
D) 90
Q30: Evaluate: (15 + 5) × 2
A) 25
B) 30
C) 40
D) 50
FACTORS, MULTIPLES & DIVISIBILITY
Q31: Which of the following numbers is a factor of 54?
A) 7
B) 8
C) 9
D) 11
Q32: The multiples of 7 among the following is
A) 25
B) 28
C) 30
D) 32
Q33: Which of these is a prime number?
A) 21
B) 29
C) 35
D) 49
Q34: Which number is a composite number?
A) 13
B) 17
C) 19
D) 21
Q35: Which of the following numbers is divisible by 3?
A) 134
B) 245
C) 372
D) 421
Q36: A number divisible by both 2 and 3 is divisible by
A) 4
B) 5
C) 6
D) 9
Q37: The HCF of 28 and 42 is
A) 7
B) 14
C) 21
D) 28
Q38: The LCM of 6 and 8 is
A) 12
B) 16
C) 24
D) 48
Q39: Which number has exactly two factors?
A) Composite number
B) Prime number
C) Even number
D) Natural number
Q40: If HCF of two numbers is 5 and their product is 500, then their LCM is
A) 50
B) 100
C) 125
D) 200
Q41: Which is an even number?
A) 15
B) 27
C) 32
D) 39
Q42: Which pair has only common factor 1?
A) 14 and 28
B) 9 and 15
C) 8 and 15
D) 21 and 35
Q43: Which of the following is divisible by 5?
A) 243
B) 315
C) 428
D) 591
Q44: The least prime factor of 91 is
A) 3
B) 5
C) 7
D) 11
Q45: How many prime numbers exist between 10 and 20?
A) 2
B) 3
C) 4
D) 5
FRACTIONS & DECIMALS
Q46: Which of the following is a proper fraction?
A) 7/5
B) 5/5
C) 3/4
D) 9/6
Q47: Which of the following is an improper fraction?
A) 2/3
B) 3/8
C) 7/4
D) 5/9
Q48: Which decimal represents the fraction 1/2?
A) 0.25
B) 0.2
C) 0.5
D) 0.75
Q49: Which fraction is equal to 3/5?
A) 6/9
B) 9/15
C) 12/25
D) 15/20
Q50: Which is the smallest among the following?
A) 0.75
B) 0.7
C) 0.65
D) 0.8
Q51: If a book costs ₹45.50 and a pen costs ₹14.75, the total cost is
A) ₹59.25
B) ₹60.25
C) ₹61.50
D) ₹62.00
Q52: Find the value of 2/5 + 3/5
A) 4/5
B) 5/5
C) 1/5
D) 6/5
Q53: What is 3.6 ÷ 10?
A) 0.36
B) 0.036
C) 3.06
D) 36
Q54: Which fraction is greater?
A) 2/3
B) 3/5
C) 4/7
D) 5/9
Q55: Which operation is required to convert a fraction into decimal?
A) Multiplication
B) Subtraction
C) Division
D) Addition
Q56: Which of the following is a terminating decimal?
A) 1/3
B) 1/7
C) 1/8
D) 2/9
Q57: Which of the following decimals is non-terminating recurring?
A) 0.5
B) 0.25
C) 0.333…
D) 0.75
Q58: A student walked 2.5 km in the morning and 1.75 km in the evening. Total distance covered is
A) 3.25 km
B) 4.00 km
C) 4.25 km
D) 5 km
Q59: Which of these fractions is in the lowest form?
A) 4/8
B) 6/9
C) 5/7
D) 10/20
Q60: When 0.75 is written as a fraction, it becomes
A) 3/4
B) 5/6
C) 6/8
D) 7/10
SQUARES, CUBES & ROOTS
Q61: The square of 15 is
A) 125
B) 200
C) 225
D) 250
Q62: Which of the following is a perfect square?
A) 45
B) 64
C) 75
D) 98
Q63: The square root of 169 is
A) 11
B) 12
C) 13
D) 14
Q64: Which number is NOT a perfect square?
A) 81
B) 121
C) 144
D) 150
Q65: The cube of 5 is
A) 15
B) 25
C) 75
D) 125
Q66: Which of the following is a perfect cube?
A) 16
B) 27
C) 45
D) 50
Q67: The cube root of 216 is
A) 4
B) 5
C) 6
D) 8
Q68: Which of the following is a perfect cube but not a perfect square?
A) 16
B) 64
C) 27
D) 81
Q69: The smallest number by which 50 must be multiplied to make it a perfect square is
A) 2
B) 5
C) 10
D) 25
Q70: The smallest number by which 54 must be multiplied to make it a perfect cube is
A) 2
B) 3
C) 6
D) 9
Q71: Square root of 0.81 is
A) 0.9
B) 0.81
C) 0.09
D) 0.8
Q72: Which of the following cannot be a perfect square?
A) Ends with 2
B) Ends with 1
C) Ends with 4
D) Ends with 6
Q73: The value of √144 + ∛27 is
A) 15
B) 18
C) 21
D) 24
Q74: Which number has a square root that is an integer?
A) 45
B) 50
C) 64
D) 72