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Number Theory Level 1

What is the sum of the given numbers: 11+22+33+44+55+66+77+88+99+(100/1)


The answer is 595.

Mohammad Arman Khaled by Mohammad Arman Khaled , 24, Kuwait

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4 solutions

I guess we don't need any solution...

2 Helpful 0 Interesting 0 Brilliant 0 Confused

100 / 1 = 100 1 = 100 100/1=\frac{100}{1}=100 11 + 22 + 33 + 44 + 55 + 66 + 77 + 88 + 99 + 100 / 1 = 11 ( 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 ) + 100 11+22+33+44+55+66+77+88+99+100/1=11(1+2+3+4+5+6+7+8+9)+100 11 × 9 ( 10 ) 2 + 100 = 11 × 90 2 + 100 = 11 × 45 + 100 = 495 + 100 = 595 11\times \frac{9(10)}{2}+100=11\times \frac{90}{2}+100=11\times45+100=495+100=\boxed{595}

1 Helpful 0 Interesting 0 Brilliant 0 Confused
Sandeep Kumar
Oct 5, 2014

11 (1+2+3+4+5+6+7+8+9)+100 = 11*45+100=495+100=595

1 Helpful 0 Interesting 0 Brilliant 0 Confused
Christian Daang
Oct 21, 2014

= 11(1+2+3+4+5+6+7+8+9) + 100

= 11(9+1)(9/2) + 100

= 11(10)(4.5) + 100

= 11(45) + 100

= 495 + 100

= 595

Final answer: 595... :D

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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