Q. 95.0( 1 Vote )

# Find the sum of all two-digit numbers which are either multiple of 2 or 3.

Answer :

Numbers divisible by both 2 and 3 are multiples of LCM of 2 and 3. So LCM of 2 and 3 is 6. Now the series is 6, 12, 18, 24…98

Sum of this series can be found by using arithmetic progression with first term 6 and common difference 6

Formula

N = 16

= 816

Hence answer is 816

Rate this question :

LCM of 10, 15 and 20 is

NCERT - Exemplar MathematicsDetermine the greatest 3-digit number exactly divisible by 8, 10 and 12.

NCERT - MathematicsFind the LCM of the following numbers in which one number is the factor of the other:

(a) 5, 20 (b) 6, 18

(c) 12, 48 (d) 9, 45

What do you observe in the results obtained?

NCERT - MathematicsFind the smallest 4-digit number which is divisible by 18, 24 and 32.

NCERT - MathematicsThe LCM of two or more given numbers is the lowest of their common_____.

NCERT - Exemplar MathematicsThe LCM of two coprime numbers is equal to the product of the number.

The LCM of two numbers is greater than the larger of the numbers.