Exercise 5.3 Solve each of the following Cryptarithms: Solution: Two possible values of A are: (i) If 7 + B < 9, 3 + A = 9 ∴ A = 6 But if A = 6, 7 + B must be larger than 9. Hence, it is impossible. (ii) If 7 + B > 9 ∴ 1 + […]
Tag: Playing with Numbers Class 8 Solution
RD Sharma Class 8 Math 5th Chapter Playing With Numbers Exercise 5.2 Solution
Exercise 5.2 1. Given that the number 35a64 is divisible by 3, where a is a digit, what are the possible values of a. Solution: 8. Find the remainder when 981547 is divided by 5. Do this without doing actual division. Solution: If a natural number is divided by 5, it has the same remainder […]
RD Sharma Class 8 Math 5th Chapter Playing With Numbers Exercise 5.1 Solution
Exercise 5.1 1. Without performing actual addition and division write the quotient when the sum of 69 and 96 is divided by: (i) 11 (ii) 15 Solution: (i) Clearly, 69 and 96 are two numbers such that one can be obtained by reversing the digits of the other. Therefore, when the sum of 69 […]
RS Aggarwal Class 8 Math Fifth Chapter Playing with Numbers Exercise 5D Solution
RS Aggarwal Class 8 Math Fifth Chapter Playing with Numbers Exercise 5D Solution 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: (b) 1 5 + x + 6 = (11 + x) must […]
RS Aggarwal Class 8 Math Fifth Chapter Playing with Numbers Exercise 5C Solution
RS Aggarwal Class 8 Math Fifth Chapter Playing with Numbers Exercise 5C Solution 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 […]
RS Aggarwal Class 8 Math Fifth Chapter Playing with Numbers Exercise 5B Solution
RS Aggarwal Class 8 Math Fifth Chapter Playing with Numbers Exercise 5B Solution 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 8. (i) 94 = Divisible (ii) 570 = Divisible […]
RS Aggarwal Class 8 Math Fifth Chapter Playing with Numbers Exercise 5A Solution
RS Aggarwal Class 8 Math Fifth Chapter Playing with Numbers Exercise 5A Solution 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 digit be x. Then, the units place digit = 3 ∴ Number […]