Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 339 · 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.🧩 A box of oranges has 7 in each row. How many oranges are in the box? (a) 14 (b) not enough info (c) 70 (d) 7
2. 2.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) what facts are given (d) the page number
3. 3.🧩 Meera bought 5 notebooks and a lunch box for ₹215 in all. Each notebook cost the same. What did one notebook cost? (a) ₹215 (b) ₹210 (c) not enough info (d) ₹43
4. 4.🧩 A box of apples has 4 in each row. How many apples are in the box? (a) not enough info (b) 8 (c) 4 (d) 40
5. 5.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
6. 6.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 6 PM (b) 7 PM (c) 5 PM (d) not enough info
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
8. 8.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 4 PM (b) 3 PM (c) 5 PM (d) not enough info
9. 9.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
10. 10.🧩 Arjun is 9 years old. Kabir is 2 years older than Arjun. How old is Kabir? (a) not enough info (b) 11 (c) 2 (d) 12
11. 11.🧩 Aarav bought 2 mangoes and a water bottle for ₹90 in all. Each mango cost the same. What did one mango cost? (a) ₹90 (b) ₹45 (c) not enough info (d) ₹88
12. 12.🧩 Arjun is 7 years old. Rohan is 8 years older than Arjun. How old is Rohan? (a) 15 (b) 8 (c) 16 (d) not enough info
13. 13.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
14. 14.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 7 (b) 14 (c) not enough info (d) 70
15. 15.🧩 Saanvi bought 2 kites and a cap for ₹90 in all. Each kite cost the same. What did one kite cost? (a) ₹88 (b) not enough info (c) ₹90 (d) ₹45
16. 16.🧩 Rohan is 11 years old. Nisha is 6 years older than Rohan. How old is Nisha? (a) 18 (b) not enough info (c) 6 (d) 17
17. 17.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
18. 18.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
19. 19.🧩 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
20. 20.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) True (b) False
21. 21.🧩 A box has 4 rows of apples, with 9 in each row. How many apples are in the box? (a) not enough info (b) 13 (c) 45 (d) 36
22. 22.🧩 Tara is 11 years old. Ishaan is 2 years older than Tara. How old is Ishaan? (a) 14 (b) not enough info (c) 2 (d) 13
23. 23.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 2 PM (b) 5 PM (c) not enough info (d) 6 PM
24. 24.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) dogs hate you (c) all dogs are mean (d) that one dog barked
25. 25.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
26. 26.🧩 Tara is 11 years old. Kabir is 6 years older than Tara. How old is Kabir? (a) not enough info (b) 6 (c) 17 (d) 18
27. 27.🧩 Kabir bought 5 balls for ₹125 in all. Each ball cost the same. What did one ball cost? (a) ₹30 (b) not enough info (c) ₹25 (d) ₹125
28. 28.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) False (b) True
29. 29.🧩 A box of mangoes has 8 in each row. How many mangoes are in the box? (a) not enough info (b) 80 (c) 16 (d) 8
30. 30.🧩 Rohan bought 6 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) not enough info (c) ₹30 (d) ₹150
31. 31.🧩 Ananya bought 4 pens for ₹200 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹200 (c) ₹55 (d) ₹50
32. 32.🧩 A box of mangoes has 4 in each row. How many mangoes are in the box? (a) not enough info (b) 8 (c) 40 (d) 4
33. 33.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 8 PM
34. 34.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) False (b) True
36. 36.🥭 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 mango is sweet (c) yes, mangoes match (d) no, check more
37. 37.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
38. 38.🧩 Ananya bought 5 notebooks for ₹275 in all. Each notebook cost the same. What did one notebook cost? (a) ₹55 (b) ₹275 (c) not enough info (d) ₹60
39. 39.🧩 Arjun is 7 years old. Tara is 4 years older than Arjun. How old is Tara? (a) 11 (b) 4 (c) 12 (d) not enough info
40. 40.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class

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