In the following number series, both follow same pattern. What will be the difference between d and a? (i) 777, 778, 787, 812, 861 (ii) 9999, a, b, c, d
In the following number series, both follow same pattern. What will be the difference between d and a? (i) 777, 778, 787, 812, 861 (ii) 9999, a, b, c, d Correct Answer 83
Considering the series (i)
777, 778, 787, 812, 861
The logic of above series can be explained as,
778 - 777 = 1 = 12
787 – 778 = 9 = 32
812 – 787 = 25 = 52
861 – 812 = 49 = 72
Given that, Series (ii) follows the same pattern,
9999 + 12 = 10000
10000 + 32 = 10009
10009 + 52 = 10034
10034 + 72 = 10083
a = 10000, b = 10009, c = 10034, d = 10083
Difference between d and a = 10083 – 10000
⇒ 83
∴ The required difference is 83
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Feb 20, 2025