Step-by-step explanation:
Down
- 0.25 of 100 = 0.25 x 1000 = 25
- 10,000 / 10^2 = 10,000/100 = 100
- 6^2-3x2 = 36-3x2 = 36-6 = 30
- 2x3^3 = 2x27 = 54
8. 2^3 x 2^2 = 8x4 = 32
9. 3/4m = 75cm (1m=100cm, 3/4x100)
10. The eighth triangular number is 36 (fI'll in a triangle with 8 balls at the base and go up in descending order. i.e 8,7,6,5,4,3,2,1. add them all up)
11. 3x(28/2) = 3x14 = 42
Across
- 213 mins = 3hrs 33mins (1hr = 60 mins)
4. 125/25 = 5 (25x5=125)
5. M - D = 500 (M=1000, D = 500 in roman numerals)
6. 6/24 = 1/4 (divide both by 6)
7. (6x8) - (8x6) = 0 (both would give the same answer. so if you take them away it will be 0)
8. 3 months
9. 7^2 = 50 -1 (50-1 is 49. that's is 7x7. so it's 7^2)
10. DXXX - CCVI = 324 (D=500 X=10 C=100 V=5 I=1, add the values of the Roman numerals to form the number and work out the calculation)
12. 10^3 - (4x10^2 + 7x10+4) = 1000-(4x100+7x10+4)
=1000-(400+70+4) =1000-(400+74)=1000-474
= 526
13. root25 - 2^2 +1 = 5 - 4 + 1= 1+1 = 2 ( work from left to right at 5 - 4 + 1. root25 is 5)
