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Question

Find the missing term(s) :
1 BR, 2 EO,6 HL,15 KI,?

A
22 NF
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B
31 NF
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C
31 NE
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D
28 NF
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Solution

The correct option is D 31 NF
Option B is the correct answer
Explanation:
The first number in the terms follow the sequence
1+12=22+22=66+32=1515+42=31
The second letter of
each group differs by 3 letters in the forward direction. Third letter of each group differs by 3
letters in the backward direction. Hence, the next term would be 31NF.

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