Question

how many 2 digit numbers are divisible by 4

Answer 1

12,16,20,24,28,32,36,40,44,48,52,56,60,64,68,72,76,80,84,88,92,96 are the two digit numbers divisible by 4

Answer 2

Hi Sir / Madam !!!

We can find this by " Arithmetic Progression "

♦ First number which is divisible by 4 [ a ] = 12

♦ Last number [ l ] = 96

♦ Common difference [ d ]= 4

♦ Numbers of 2 - digit numbers [ n ] = ?

Equation : -

l = a + ( n - 1 ) × d

Substituting values : -

96 = 12 + ( n - 1 ) × 4

96 - 12 = ( n - 1 ) × 4

84 = ( n - 1 ) × 4

$\frac{84}{4} = (n - 1) \\ \\ 21 = n - 1 \\ \\ n = 21 + 1 \\ \\ n = 22$

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