The third question reminds me that we are always provided with at least three clues to predict the answer. I first answered D if you separate the patterns between white and dark faces. Pattern dark faces: 1. Circle move half a quarter counterclockwise. 2. Triangle moving back and forth a quarter counterclockwise. But the rule is only true for two examples and therefore wouldn’t be classified as a pattern.
Awesome video. the 20% problem i solved different way, since we have answers it is easier to calculate 10% from the total and double it; 10% from 90 is 9, thus 20% will be 18, 90-18=72
Calculate the missing number: 21, 35, 41, 59, 61, 83, ? I just looked at the position of the odd numbers in the sequence (21, 41, 61,...) then the missing number is 81.
Hello! Thank you for this video, it was very useful! For the problem at 22:00, I solved the problem in a different way! 3 X 6 = 18. 18 - 6 = 12. 4 X 12 = 48. 48 - 12 = 36. This means that 5 X 20 = 100. 100 - 20 = 80. We multiply the first two numbers and subtract our result with the second multiplier.
@ 18:46 another way of looking at it is to place the first square oover the following one to get the third. Dark on dark gives white, white on white gives white and the dark on white or white on dark gives dark.
The one with the numbers on the row with the answer being 81, couldn’t you just say that half the numbers don’t follow a sequence, but every other one follows an increase of 20? 21 ,41,61,81
@18:03 i got the same answer but followed different logic. first i calculated the differences of consecutive numbers. these are: 14,6,18,2,22. then i noticed that the difference of every second number (14,18,22) and (6,2) is 4 or -4. when you write these in three rows you get 21 35 41 59 61 83 14 6 18 2 22 4 -4 4 (-4)
