Question

If 10a + 4. 10a + 5, 10a + 6, 10a + 7 and 10a + 8 are the composite numbers whose sum is 130, then
the value of 'a' is
(A) 2
(B) 3
(C) 4
(D) 5​

Answer 1

Answer:

a) 2

Step-by-step explanation:

10a+4, 10a+5, 10a+6, 10a+7, 10a+8

10a+ 10a+ 10a +10a + 10a = 50 a

4+5+6+7+8 = 30

50a + 30 = 130

50a = 130-30

50a = 100

a = 100/50

a = 2

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