1.

How many numbers up to 200 are divisible by 2 and 3 both

Answer» 6, 12, 18,.....198

a=6, d=6

198 = a+(n-1)d
198= 6+(n-1)6
198 - 6 = (n-1)6
192 = (n-1)6
n-1=192÷6
n-1=32
n=33


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