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प्रश्न
Complete the following activity to find the number of natural numbers between 1 and 171, which are divisible by 5:
Activity :
उत्तर
a = 5 , d = 10 - 5 = 5 , tn = 170
tn = a + (n - 1)d
170 = 5 + (n - 1) × 5
170 = 5 + 5n - 5
170 = 5n
n = 34
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