Subject: Mathematics
Book: Maths Mastery
PEMDAS (Parentheses, Exponents, Multiplication/Division, Addition/Subtraction) or BODMAS (Brackets, Orders, Division/Multiplication, Addition/Subtraction) clarifies the sequence in which to tackle operations. For example, to evaluate 3 + 2 × (5 – 2)², start inside parentheses: (5 – 2) = 3, then exponents: 3² = 9, next multiplication: 2 × 9 = 18, and finally addition: 3 + 18 = 21. Following this strict hierarchy prevents confusion and ensures consistent results across all math problems. This concept underpins everything from basic arithmetic to advanced algebra, guaranteeing accurate calculations in daily life—like computing tax on multiple items or analyzing complex spreadsheet formulas.
A sum of money doubles itself in 5 years at simple interest. What is the rate of interest?
View QuestionThe probability of rolling a sum of 7 with two dice is:
View QuestionWhat is the area of a sector of a circle with radius 14 cm and central angle 90°?
View QuestionA number is increased by 20% and then decreased by 20%. What is the net change?
View QuestionWhat is the probability of drawing an ace from a standard deck of 52 cards?
View QuestionWhat is the cube root of 729?
View QuestionIf sin(A) = 3/5 and cos(B) = 5/13, where A and B are acute angles, what is sin(A+B)?
View QuestionThe probability of getting an even number when rolling a die is:
View QuestionThe perimeter of a rectangle is 40 cm, and its length is 12 cm. What is its width?
View QuestionA sum triples in 20 years at simple interest. What is the rate of interest per annum?
View Question