Question

a four digit number is divided by 35 and has a remainder of 15 the first three digits are in 155 what is the fourth digit of the number ?

Answer 1

Answer:

1400

Explanation:

We are given a four-digit number with leading digits 1, 5, and 5. When this number is divided by 35 the remainder is 15. We are asked to find the last digit.

(1) We can try a guess and revise strategy. We are looking for a multiple of 35 that is 15 below the number 155x, where x is an unknown number.

35*25=875 This number is way too low. (25 was just picked randomly.)

35*40=1400