EXERCISE 5D OBJECTIVE QUESTIONS Tick (√) the correct answer in each of the following: (1) If 5×6 is exactly divisible by 3, then the least value of x is Ans:… Read more »

EXERCISE 5C Replace A, B, C by suitable numerals. (1) Solution: A + 7 = 13 ⇒ A = 13 – 7 = 6 So, 1 is carried over. (1 + 5 + 8) = 14. So, B = 4 and 1 is carri… Read more »

EXERCISE 5B (1) Test the divisibility of each of the following numbers by 2. Rule: A given number is divisible by 2 only when its unit digit is 0, 2, 4, 6 or… Read more »

EXERCISE 5A (1) The units digit of a two-digit number is 3 and seven times the sum of the digits is the number itself. Find the number. Solution: Let the dig… Read more »

EXERCISE 4D OBJECTIVE QUESTIONS Tick (√) the correct answer in each of the following: (1) Which of the following numbers is a perfect cube? Ans: (C) 216 216 … Read more »