Question

if 1 is equal to 5 2 is equal to 10 3 is equal to 15 4 is equal to 20 then 5 is equal to

Answer 1

the answer is 25......

Answer 2

↑ Here is your answer ↓
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These numbers are in Arithmetic progression,

$5, 10, 15, 20...$

$a_1 = 5$

$d = 5$

$a_5 = a + 4d$

$a_5 = 5 + 4(5)$

$a_5 = 5 + 20$

$a_5 = 25$