Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 121 · 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.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
2. 2.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
3. 3.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 3 PM
4. 4.🧩 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
5. 5.🧩 A box has 8 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 13 (b) 45 (c) not enough info (d) 40
6. 6.🔬 Why do scientists repeat an experiment? (a) to change answers (b) to waste time (c) to be sure of results (d) for fun only
7. 7.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
8. 8.🧩 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
9. 9.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 6 PM (b) 3 PM (c) 5 PM (d) not enough info
10. 10.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
11. 11.🧩 The film starts at 4 PM and lasts 2 hours. When does it end? (a) 7 PM (b) 4 PM (c) not enough info (d) 6 PM
12. 12.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) 6 PM (c) not enough info (d) 7 PM
13. 13.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
14. 14.🧩 Ananya is 8 years old. Vihaan is 2 years older than Ananya. How old is Vihaan? (a) not enough info (b) 2 (c) 11 (d) 10
15. 15.🧩 A box has 4 rows of oranges, with 4 in each row. How many oranges are in the box? (a) 8 (b) not enough info (c) 16 (d) 20
16. 16.🧩 A box of oranges has 8 in each row. How many oranges are in the box? (a) 16 (b) 80 (c) not enough info (d) 8
17. 17.🥭 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) no, check more (c) yes, it is certain (d) yes, mangoes match
18. 18.🧩 The film starts at 5 PM and lasts 1 hour. When does it end? (a) not enough info (b) 7 PM (c) 5 PM (d) 6 PM
19. 19.🧩 A box has 5 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 12 (b) 35 (c) 42 (d) not enough info
20. 20.🧩 Nisha is 8 years old. Arjun is 3 years older than Nisha. How old is Arjun? (a) 11 (b) 12 (c) not enough info (d) 3
21. 21.🧩 Vihaan bought 4 mangoes and a cap for ₹300 in all. Each mango cost the same. What did one mango cost? (a) ₹75 (b) ₹300 (c) not enough info (d) ₹296
22. 22.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
23. 23.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
24. 24.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 7 PM (b) 9 PM (c) not enough info (d) 8 PM
25. 25.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
27. 27.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) 16 (b) 8 (c) not enough info (d) 80
28. 28.🧩 Diya bought 2 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹30 (c) ₹35 (d) ₹60
29. 29.🧩 A box has 3 rows of guavas, with 5 in each row. How many guavas are in the box? (a) 8 (b) 20 (c) not enough info (d) 15
30. 30.🧩 Diya bought 3 pens for ₹60 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) not enough info (c) ₹60 (d) ₹25
31. 31.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) dogs hate you (d) never see dogs
32. 32.🧩 Nisha bought 6 kites for ₹210 in all. Each kite cost the same. What did one kite cost? (a) ₹210 (b) not enough info (c) ₹35 (d) ₹40
33. 33.🧩 A box has 6 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 10 (b) not enough info (c) 28 (d) 24
34. 34.🧩 Rohan is 8 years old. Aarav is 7 years older than Rohan. How old is Aarav? (a) not enough info (b) 16 (c) 15 (d) 7
35. 35.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 50 (b) 10 (c) 5 (d) not enough info
36. 36.🧩 Tara is 11 years old. Arjun is older than Tara. How old is Arjun? (a) 16 (b) 13 (c) not enough info (d) 12
37. 37.🧩 Saanvi bought 2 kites for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹40 (b) ₹45 (c) not enough info (d) ₹80
38. 38.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
39. 39.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 6 PM (c) 5 PM (d) not enough info
40. 40.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False

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