Question

Check whether 5 x 3 x 7 + 7 and 5 x 7 x 13 x 23 +23 is composite number and justify

Answer 1

5×3×7+7=112 which is a composite number

factors of 112=1,2,4,7,8,14,16,28,56,112

5×7×13×23+23=10488 which is a composite number

factors of 10488=1,2,3,4,6,8,12,19,23,24,3846,57,69,76,92,114,138,152,184,228,276,437,456,552,874,1311,1748,2622,3496,5244,

hope that helps you