Examples for secondary school students - page 25 of 212
Number of problems found: 4231
- Containers
One in eight containers is temporarily misplaced. A random sample of 12 containers is selected. What is the probability that 6 of these containers will be temporarily misplaced? - Number line
Find a number on the number line whose distance from the number 3 is four times smaller than from the number 15 (specify both solutions). - Cis notation
Evaluate multiplication of two complex numbers in cis notation: (6 cis 120°)(4 cis 30°) Write the result in cis and Re-Im notation. - And-or probabilities
P(A ) = 0.53, P(B) = 0.15, and P(A n B ) = 0.18. Find P(A U B ). Round approximations to two decimal places. - Giraffe 2
The lifespan of a guinea pig is six years less than that of a giraffe. The lifespan of a tiger is four times that of a guinea pig. If the total lifespan of the animals is 30 years, calculate the longevity of the giraffe. - The gems
The jeweler selects four gems for the ring. It has rubies, emeralds, and sapphires. How many options does he have? - Seeds
The germination of seeds of a certain species of carrot is 96%. What is the probability that at least 25 seeds out of 30 will germinate? - Open intervals
Open intervals A = (x-2; 2x-1) and B = (3x-4; 4) are given. Find the largest real number for which A ⊂ B applies. - Proportional relationship
The ordered pairs (6,24) and (1, s) represent a proportional relationship. Find the value of s. - The data
The data set represents the number of cars in a town given a speeding ticket each day for ten days. 2 4 5 5 7 7 8 8 8 12 What is the IQR? - Vectors abs sum diff
The vectors a = (4,2), b = (- 2,1) are given. Calculate: a) |a+b|, b) |a|+|b|, c) |a-b|, d) |a|-|b|. - Possible combinations - word
How many ways can the letters F, A, I, and R be arranged? - Distance between 2 points
Find the distance between the points (7, -9), (-1, -9) - Today in school
There are nine girls and 11 boys in the class today. What is the probability that Suzan will go to the board today? - Free fall
The free fall body has gone 10m in the last 0.5s. Find the body speed at the moment of impact. - Mixed with percentages
Calculate 33 1/3% of 570. - Integer
Find the integer whose distance on the numerical axis from number 1 is two times smaller than the distance from number 6. - Nineteenth member
Find the nineteenth member of the arithmetic sequence: a1=33 d=5 find a19 - Sum of two primes
Christian Goldbach, a mathematician, found out that every even number greater than two can be expressed as a sum of two prime numbers. Write or express 2018 as a sum of two prime numbers. - Elements
If the number of elements is decreased by two, the number of permutations is decreased 30 times. How many elements are?
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