Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 63 · 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.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
2. 2.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
3. 3.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a loud opinion (d) a guess
4. 4.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
5. 5.🧩 Rohan is 6 years old. Vihaan is older than Rohan. How old is Vihaan? (a) not enough info (b) 8 (c) 7 (d) 11
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking your pet (c) asking one friend (d) guessing
7. 7.🧩 A box has 6 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 11 (b) 30 (c) 35 (d) not enough info
8. 8.🧩 Ananya bought 3 kites and a water bottle for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹80 (b) not enough info (c) ₹26 (d) ₹77
9. 9.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
10. 10.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 8 PM (c) 7 PM (d) not enough info
11. 11.🧩 A box has 7 rows of guavas, with 7 in each row. How many guavas are in the box? (a) not enough info (b) 14 (c) 56 (d) 49
12. 12.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
13. 13.🧩 Arjun bought 5 notebooks for ₹150 in all. Each notebook cost the same. What did one notebook cost? (a) ₹35 (b) not enough info (c) ₹30 (d) ₹150
14. 14.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
15. 15.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 5 PM (d) 7 PM
16. 16.🧩 Nisha is 7 years old. Saanvi is 3 years older than Nisha. How old is Saanvi? (a) not enough info (b) 11 (c) 3 (d) 10
17. 17.🧩 A box of oranges has 5 in each row. How many oranges are in the box? (a) 50 (b) 5 (c) not enough info (d) 10
18. 18.🧩 Before solving a word problem, first check… (a) the colour of ink (b) the page number (c) your handwriting (d) what facts are given
19. 19.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 6 (b) not enough info (c) 12 (d) 60
20. 20.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
22. 22.🧩 Rohan is 12 years old. Arjun is older than Rohan. How old is Arjun? (a) 17 (b) not enough info (c) 14 (d) 13
23. 23.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) 8 PM (b) not enough info (c) 9 PM (d) 6 PM
24. 24.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
25. 25.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Saanvi is 8 years old. Aarav is 9 years older than Saanvi. How old is Aarav? (a) 9 (b) 18 (c) 17 (d) not enough info
27. 27.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no, check more (c) yes, mangoes match (d) no mango is sweet
28. 28.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 10 PM (c) 9 PM (d) not enough info
29. 29.🧩 Meera is 11 years old. Aarav is 7 years older than Meera. How old is Aarav? (a) not enough info (b) 18 (c) 7 (d) 19
30. 30.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
31. 31.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
32. 32.🧩 Meera bought 4 notebooks for ₹160 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) ₹160 (c) not enough info (d) ₹40
33. 33.🧩 A box has 6 rows of apples, with 5 in each row. How many apples are in the box? (a) not enough info (b) 30 (c) 35 (d) 11
34. 34.🧩 A box has 6 rows of guavas, with 8 in each row. How many guavas are in the box? (a) 48 (b) not enough info (c) 56 (d) 14
35. 35.🧩 Vihaan bought 2 balls and a water bottle for ₹180 in all. Each ball cost the same. What did one ball cost? (a) ₹180 (b) not enough info (c) ₹178 (d) ₹90
36. 36.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
37. 37.🧩 Aarav is 7 years old. Arjun is older than Aarav. How old is Arjun? (a) not enough info (b) 12 (c) 8 (d) 9
38. 38.🧩 Ishaan is 7 years old. Arjun is 9 years older than Ishaan. How old is Arjun? (a) 16 (b) 17 (c) not enough info (d) 9
39. 39.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
40. 40.🧩 Diya bought 6 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) ₹10 (b) ₹60 (c) ₹15 (d) not enough info

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