1. EASY

2+2+2+2+2+2+2 can also be rewritten as what in multiplication form?

  1. 2x7
  2. 7x2
  3. 14
  4. A and B
  5. None of the above
 
2. EASY

3+3+3+3+3 can be written as what in multiplication form?
 
3. MEDIUM

4+4+4+4+4-4-4 can be written as what in multiplication form?
 
4. MEDIUM

What is the value of 5+5+5+5?
 
5. HARD

What is 3+3+3+3+1+1+1+1+5+5+5+5?

  1. 36
  2. 31
  3. 22
  4. 53
  5. 37
 
6. HARD

Which one of the following equals to 2+4+6+8+...+100 ?

  1. 5050
  2. 2550
  3. 2500
  4. 1275
  5. 1020
 
7. HARD

A really long time ago, this really mean teacher asked this super cool math kid named Gauss what the value of 1+2+3+4+5+...+98+99+100 was. But since Gauss was so cool he got it. Can you do it too? [ HINT: Gauss rearranged the numbers like so: (1+100)+(2+99)+(3+98)+... ]


Resources:


More questions:
Volume  |   Geometric Patterns  |   Division  |   Problem Solving  |   Triangles