alleryStart learning →For N=100a+10b+c, N-(a+b+c) equals?
A99a + 9b
B99a + 10b
C100a + 9b
D100a + 10b
Answer & Solution
Correct answer: A. 99a + 9b
Subtracting the digit sum cancels c and reduces the other coefficients to 99 and 9.
Keep practising Playing with Numbers
Browse all Playing with Numbers questions for ICSE Class 8, or explore more Mathematics topics.
Related questions
No digit is 9 in a three-digit number. Increase each digit by 1. Rise in value?What is the smallest three-digit integer with digit sum 20?A three-digit number starts with 7 and has digit sum 7. The number?What remainder does 572 leave on division by 9?From 100 to 150 inclusive, how many integers are divisible by both 3 and 5?How many three-digit palindromes are divisible by 10?In three-digit palindrome A3A, 9 divides the value. Find digit A.Arrange 0,1,2 once each. Count valid three-digit multiples of 3.