allery2, ?, 12, 20, 30 ରେ ଗୋଟିଏ ସଂଖ୍ୟା ଲୁଚି ରହିଛି। ସେହି ଲୁକ୍କାୟିତ ସଂଖ୍ୟାଟି କ’ଣ?
A6
B8
C4
D10
Answer & Solution
Correct answer: A. 6
ପଦଗୁଡ଼ିକ n x (n + 1) ନିୟମ ଅନୁସରଣ କରେ: 1x2, 2x3, 3x4, 4x5, 5x6, ତେଣୁ ଦ୍ୱିତୀୟ ପଦଟି 6 ଅଟେ।
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