Brain Teasers
Tricky Math
Solve the following problem:
0+0-0+1-1+2-2+3-3+4-4+5-5+6-6+7-7+8-8+9-9+10-10+11-11+12-12+13-13+14-14+15-15+16-16+17-17+18-18+19-19+20-20+21+22-22+23-23+24-24+25-25+26-26+27-27+28-28+29-29+30-30+31-31+32-32+33-33+34-34+35-35+36-36+37-37+38-38+39-39+40-40+41-41+42-42+43-43+44-44+45-45+46-46+47-47+48-48+49-49+50-50=??
0+0-0+1-1+2-2+3-3+4-4+5-5+6-6+7-7+8-8+9-9+10-10+11-11+12-12+13-13+14-14+15-15+16-16+17-17+18-18+19-19+20-20+21+22-22+23-23+24-24+25-25+26-26+27-27+28-28+29-29+30-30+31-31+32-32+33-33+34-34+35-35+36-36+37-37+38-38+39-39+40-40+41-41+42-42+43-43+44-44+45-45+46-46+47-47+48-48+49-49+50-50=??
Hint
Is there a pattern through the whole problem?Answer
21If you read carefully you would notice it was 0+0-0+1-1+...+20-20+21+22-22+...+50-50=??
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