If a number if divided by 15 it leaves a remainder of 7 .if thrice the number is divided by 5 then remainder will be:
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When divided by 15 ,it leaves remainder 7. So we can say the number is … 15x + 7 . Now thrice of number is 3(15x +7) = 45x + 21 . Now this number is divided by 5 ….here we can write 45x/5 + 21 /5 . So here 45x /5 gives 9x. So the remainder will be due to of 21 . So we can say the remainder will be 1
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