Variables
X / 6 = 8
X = 48
2x =3.2
x=1.6
What is the name of a rectangle having all four sides of equal length?
A Square
A man has 53 socks in his drawer: 21 identical blue, 15 identical black and 17 identical red. The lights are out and he is completely in the dark. How many socks must he take out to make 100 percent certain he has at least one pair of black socks?
40 socks. If he takes out 38 socks (adding the two biggest amounts, 21 and 17), although it is very unlikely, it is possible they could all be blue and red. To make 100 percent certain that he also has a pair of black socks he must take out a further two socks.
What is the divisibility test for 3?
You add up the digits in a number and check if the number is divisible by 3.
12x + 3 = 4x + 15
x = 2
3f+2=8-3f
f=1
What is another name for a 90 degree angle?
A Right angle.
Five people were eating apples, A finished before B, but behind C. D finished before E, but behind B. What was the finishing order?
CABDE. Putting the first three in order, A finished in front of B but behind C, so CAB. Then, we know D finished before B, so CABD. We know E finished after D, so CABDE.
What is the divisibility test for 6?
If it is divisible by both 2 and 3.
(4y + 2)x2 = 36
y = 4
2=m/2-7
m=18
What is the name of a triangle with all sides equal and all angles equal?
An Equilateral Triangle
There was a plane crash and every single person died. Who survived?
Married couples
What is the divisibility test for 0?
There is no divisibility test for 0.
-2x - 10 = 3x + 5
x = -3
3(q−7)=27
q=16
What is the shape of an equilateral parallelogram that has oblique angles?
A rhombus!!
The day before two days after the day before tomorrow is Saturday. What day is it today?
Friday. The “day before tomorrow” is today; “the day before two days after” is really one day after. So if “one day after today is Saturday,” then it must be Friday.
What is the divisibility test for 8?
If the last three digits of the number is divisible by eight, the original number is divisible by eight.
4 × 2 + 3x - 28 = 0
x = 6.(6) or 6 remainder 2
12−51r=2r+1
r=5
A three dimensional shape has width 18, height 14, and depth 6.7
What is the volume of this shape?
The volume of this shape is 1688.4
Pens cost more than pencils. Pens cost less than eraser. Erasers cost more than pencils and pens. If the first two statements are true, is the third statement TRUE or FALSE?
TRUE!! If the first two statements are true, then Erasers are the most expensive of the three stationery items.
What is the divisibility test for 18?
There are two possible divisibility tests for 18. First, if it's divisible by 6 and 3. Second, if it's divisible by 9 and 2.