Q1 What is the sum of first 15
multiples of 7?
840
740
800
900
Answers
Answered by
0
840
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Answered by
1
Answer:
840
Step-by-step explanation:
7 ×1 + 7×2 + 7×3 + 7×4 + 7×5 + 7×6 + 7×7 + 7×8 + 7×9 + 7×10 + 7×11 + 7×12 + 7×13 + 7×14 + 7×15
= 7(1+2+3+4+5+6+7+8+9+10+11+12+13+14+15)
= 7 × 120
840
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