Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 559 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
2. 2.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 4 PM
3. 3.🧩 Saanvi bought 2 mangoes for ₹70 in all. Each mango cost the same. What did one mango cost? (a) ₹70 (b) ₹40 (c) ₹35 (d) not enough info
4. 4.🧩 Ishaan is 12 years old. Arjun is older than Ishaan. How old is Arjun? (a) 13 (b) 14 (c) not enough info (d) 17
5. 5.🧩 Ananya bought 2 mangoes for ₹30 in all. Each mango cost the same. What did one mango cost? (a) ₹15 (b) ₹30 (c) ₹20 (d) not enough info
6. 6.🧩 Aarav is 12 years old. Vihaan is 6 years older than Aarav. How old is Vihaan? (a) 19 (b) 6 (c) 18 (d) not enough info
7. 7.🧩 Tara bought 4 balls and a lunch box for ₹150 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹146 (c) ₹37 (d) ₹150
8. 8.🧩 A box has 7 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 14 (b) not enough info (c) 49 (d) 56
9. 9.🧩 A box has 5 rows of guavas, with 8 in each row. How many guavas are in the box? (a) not enough info (b) 48 (c) 40 (d) 13
10. 10.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
11. 11.🧩 A box has 5 rows of guavas, with 6 in each row. How many guavas are in the box? (a) 30 (b) not enough info (c) 11 (d) 36
12. 12.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
13. 13.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
14. 14.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
15. 15.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
16. 16.🧩 The film starts at 5 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 5 PM (c) not enough info (d) 9 PM
17. 17.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
18. 18.🧩 Rohan is 12 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 13 (b) 14 (c) 17 (d) not enough info
19. 19.🧩 Arjun is 9 years old. Saanvi is 2 years older than Arjun. How old is Saanvi? (a) 12 (b) 2 (c) not enough info (d) 11
20. 20.🧩 Nisha is 12 years old. Aarav is older than Nisha. How old is Aarav? (a) 17 (b) not enough info (c) 13 (d) 14
21. 21.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 7 PM (d) 5 PM
22. 22.📝 What does “evidence” mean? (a) a rumour (b) a guess (c) a loud opinion (d) facts that support it
23. 23.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
24. 24.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
25. 25.🧩 Nisha bought 3 pens and a water bottle for ₹170 in all. Each pen cost the same. What did one pen cost? (a) ₹170 (b) ₹56 (c) ₹167 (d) not enough info
26. 26.🧩 Meera is 9 years old. Arjun is older than Meera. How old is Arjun? (a) 14 (b) not enough info (c) 10 (d) 11
27. 27.🧩 Diya is 7 years old. Ananya is 8 years older than Diya. How old is Ananya? (a) 8 (b) 16 (c) not enough info (d) 15
28. 28.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
29. 29.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
30. 30.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) asking the whole class (d) guessing
31. 31.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
32. 32.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
33. 33.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
34. 34.🧩 Arjun bought 6 kites for ₹300 in all. Each kite cost the same. What did one kite cost? (a) ₹300 (b) ₹50 (c) not enough info (d) ₹55
35. 35.🧩 Kabir bought 2 notebooks and a cap for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹88 (b) not enough info (c) ₹90 (d) ₹45
36. 36.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
37. 37.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) yes, it is certain (c) yes, mangoes match (d) no, check more
38. 38.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 14 (b) not enough info (c) 7 (d) 70
39. 39.🧩 Meera bought 3 kites and a cap for ₹135 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) ₹132 (c) ₹135 (d) not enough info
40. 40.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence

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