4th Grade
Math
Math
which shape has 3 equal sides?
equilateral triangle
what is the mode among numbers below?
23; 34; 21; 34; 25; 34; 21; 55; 67;
34
can you use the ruler to measure the length of the straight line?
No
what is the x-coordinate of the point at (4 , 10)
4
what is the Chinese name of Mr.Clark
赵一鸣
Express 0.06 as a fraction
6/100
What is 4.25 + 6.13?
10.38
Calculate the mean among numbers below
26; 18; 32; 24; 20
24
9168 + 2915
12083
what is the sum of interior angles of the rectangle?
360
19.06 - 13.14
5.92
Which digit is in the hundredths place?
12,485.96
6
What is the place value of the 4 in 3,427,891?
Hundred thousands place
199 x 4
796
612,532 + 44,622
657,154
What is 216 divided by 8?
27
What is 602,564 - 129,875 ?
472,689
The digit 6 is in what place?
1,623,985
hundred thousands
Write all prime numbers that are less than 35.
2; 3; 5; 7; 11; 13; 17; 19; 23; 29; 31;
What is 6091 x 75?
456825
Find the highest common multiple of 72 and 108
216
What is the 273952 divided by 32?
8561
What is the 32/25 minus 27/30? Give the simplest fraction.
19/50
Calculate the area of square with side length 4.02cm.
16.1604
Magnus has to play 15 games in a chess tournament. At some point during the tournament he has won half of the games he has played, he has lost one third of the games he has played and two have ended in a draw. How many games does Magnus still have to play?
3
The sum of the ages of Kate and her mother is 36. The sum of the ages of her mother and her grandmother is 81. How old was her grandmother when Kate was born?
45
Nick wants to arrange the numbers 2, 3, 4, . . . , 10 into several groups such that the sum of the numbers in each group is the same. What is the largest number of groups he can get?
3
A little kangaroo is playing with his calculator. He starts with the number 12. He multiplies or divides the number by 2 or 3 for 60 times in a row. Which of the following results cannot be obtained?
(A) 12 (B) 18 (C) 36 (D) 72 (E) 108
C
A bag contains only red marbles and green marbles. For any 5 marbles we pick, at least one is red. For any 6 marbles we pick, at least one is green. What is the largest number of marbles that the bag can contain?
9
Granny has 10 grandchildren. Alice is the eldest. One day, Granny notices that her grandchildren all have different ages. If the sum of her grandchildren’ ages is 180, what is the youngest Alice could be?
23