Quiz 3-4 số 31 - Logical Thinking and Combinatorics

According to the pattern below, what is the English letter in the question mark?

G, I, L, N, ?, S, ....

Ashley needs 15 minutes to finish a math exercise and then rests for 10 minutes. At most how many math exercises can Ashley finish in 6 hours?

According to the pattern, how many * are there in the 12th group?

According to the pattern shown below, what is the number in the question mark? 2, 2, 4, 6, 10, 16, ?, ....

A factory machine produces a bag of potato chips every 3 minutes. If that machine starts producing potato chips from 08:00, at most how many bags of potato chips can be produced by that machine at 08:35?

Julia has total 17 coins including $1 and $2 coins.

She has $30 in total.

How many $1 coin(s) does she have?

A box contains 11 red, 13 black and 13 white balls. Only one ball can be drawn each time. At least how many time(s) do we need to draw to ensure we have 2 balls of each colour?

A teacher gives 99 pens to give to 7 students. At least how many pen(s) does the student who gets the most pens have?

A flight of stairs has 11 steps. Peter can go up for 1 step or 3 steps each time. How many way(s) is / are there for Peter to go up the stairs?

How many 2-digit number(s) is / are there such that the number contains digit “3”?