Question
If O is the orthocentre of ΔABC , if ∠BOC =
1000 then what is the measure of ∠BAC?Solution
If O is the orthocentre of ΔABC, then ∠BOC + ∠BAC = 180 0 or 1000  + ∠BAC  = 180 0   or ∠BAC = 180 0  - 1000   = 800 Â
Simplify the following expressions and choose the correct option.
{[(13)² − (7)²] ÷ 12} × 4 = ?
(25)² × 4 ÷ 5 + (3)³ + 48=? + 425
?2 + 114 - 48 ÷ 2 × 5 = 163
182 + 10 × 12 - ? = 312
2/5 of 3/4 of 7/9 of 7200 = ?
If (3 × 144 – 252 ÷ 14) ÷ 18 = √1024 – x, then find the value of ‘x’.
12.50% of 1440 - 17 × 51 + 721 =?
[(15)³ × (8)²] ÷ (90 × 6) = ?²
?2 - (40% of 240) = 25 X 5
Simplify: 48 ÷ 4 × 3 + 5 × (6 − 2)