Understanding direct and inverse proportions and solving percentage-based problems. Test Breakdown and Example Solutions 1. Divisibility and Multiples

To find the percentage decrease from 4.2 to 3.57 : Find the difference: Calculate the percentage: How to Use the Test Book Effectively

You may be asked to list all divisors of a number (e.g., for 8 , the divisors are 1, 2, 4, 8 ) or verify if one number divides another (e.g., 7 is a divisor of 14 ).

These problems test your ability to understand relationships between varying quantities.

x=36.1×10019=190 tonsx equals the fraction with numerator 36.1 cross 100 and denominator 19 end-fraction equals 190 tons

Most tests are divided into a "Mandatory Part" (Обязательная часть) for basic passing and a "Supplementary Part" for higher grades.

Identifying divisors and multiples, prime and composite numbers, and using divisibility rules for 2, 3, 5, 9, and 10.